From f857501780d23284038ca94c2d6a7ee02dda41fe Mon Sep 17 00:00:00 2001
From: arjunshajitech <arjunforpc@gmail.com>
Date: Fri, 17 Apr 2026 00:14:14 +0530
Subject: [PATCH] Parse rtp extension from padding only empty packet

---
 rtptransceiver.go      |  8 +++-----
 rtptransceiver_test.go | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 5 deletions(-)

diff --git a/rtptransceiver.go b/rtptransceiver.go
index d3dcfa79..130a6859 100644
--- a/rtptransceiver.go
+++ b/rtptransceiver.go
@@ -432,12 +432,10 @@ func handleUnknownRTPPacket(
 		return mid, rid, rsid, false, err
 	}
 
-	if rp.Padding && len(rp.Payload) == 0 {
-		return mid, rid, rsid, true, nil
-	}
+	isPaddingOnlyPacket := rp.Padding && len(rp.Payload) == 0
 
 	if !rp.Header.Extension {
-		return mid, rid, rsid, false, nil
+		return mid, rid, rsid, isPaddingOnlyPacket, nil
 	}
 
 	if payload := rp.GetExtension(midExtensionID); payload != nil {
@@ -452,5 +450,5 @@ func handleUnknownRTPPacket(
 		rsid = string(payload)
 	}
 
-	return mid, rid, rsid, false, nil
+	return mid, rid, rsid, isPaddingOnlyPacket, nil
 }
diff --git a/rtptransceiver_test.go b/rtptransceiver_test.go
index 28ed1183..0cc6e743 100644
--- a/rtptransceiver_test.go
+++ b/rtptransceiver_test.go
@@ -273,3 +273,35 @@ func Test_RTPTransceiver_UnattachedRTX(t *testing.T) {
 
 	closePairNow(t, offerPC, answerPC)
 }
+
+func Test_ParseExtensionFromPaddingOnlyPacket(t *testing.T) {
+	buf := []byte{
+		176, 114, 15, 39, 0, 0, 0, 0, 209, 108, 221, 2, 190,
+		222, 0, 2, 64, 49, 176, 102, 49, 0, 1, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 255,
+	}
+	mid, rid, rsid, paddingOnly, err := handleUnknownRTPPacket(
+		buf, uint8(4),
+		uint8(10),
+		uint8(11),
+	)
+	assert.NoError(t, err)
+
+	assert.Equal(t, mid, "1")
+	assert.Equal(t, rid, "")
+	assert.Equal(t, rsid, "f")
+	assert.Equal(t, paddingOnly, true)
+}